GameClosure > Particles

Particles.js

/** MOLECULE MATCH - Particles
 *
 *		Utility View for GameClosure DevKit to add an
 *    explosion of Particles anywhere on the screen.
 *
 *    Modified for github
 *
 * @author		David "oodavid" King
 * @copyright	Copyright (c) 2014 +
 */
	import device;
	import ui.ParticleEngine as ParticleEngine;
	var gx = Math.ceil(Math.min(device.width,device.height)/20); // A fitting size for the screen

	// Extend the ParticleEngine
	exports = Class(ParticleEngine, function(supr){
		this.init = function(opts){
			supr(this, 'init', [merge(opts, {
				canHandleEvents: false,
				width:     1,
				height:    1,
				initCount: 60
			})]);
			this.tick = this.runTick;
		};
		this.addParticles = function(x, y, type, silent){
			var n = 20;
			// Play the noise?
			if(!silent){
				GC.app.audio.play('particles_'+type);
			}
			// Add particles to the specified spot
			var particleObjects = this.obtainParticleArray(n);
			for (var i = 0; i < n; i++) {
				// When using 'confetti' there are a number of variants, cycle through them
				icon = type == 'confetti' ? 'confetti_'+(i%4) : type;
				// Basic settings
				var pObj     = particleObjects[i];
				pObj.image   = 'resources/images/particles/'+icon+'.png';
				pObj.width   = (gx*2);
				pObj.height  = (gx*2);
				pObj.anchorX = (gx);
				pObj.anchorY = (gx);
				// Position
				pObj.x = x-(gx);
				pObj.y = y-(gx);
				pObj.r = Math.random() * 6.3;
				// Movement
				pObj.delay = i * 5;
				pObj.dx    = (gx*20) - Math.random() * (gx*40);
				pObj.dy    = (gx*20) - Math.random() * (gx*40);
				pObj.ddy   = (gx*10); // gravity is constant
				pObj.dr    = 6*(Math.random()-0.5);
				pObj.ddopacity = -1;
				pObj.ttl   = 2000;
			}
			this.emitParticles(particleObjects);
		};

	});